Fluke PM-3384B, PM-3380B, PM-3390B 74COMMAND Reference, Syntax READVOLTagemeasurefunction?

4 - 74COMMAND REFERENCE

READ?

Syntax: READ[:VOLTage]<measure_function>?

[[ (<voltage_parameters>),] <measure_parameters>] [,<channel_list>]

The syntax elements are specified with the MEASure? query.

Response: <NR3>

Example: <1.25E-01> = 0.125

Description:

The READ? queries are part of the measurement instruction set. They start a measurement and return the signal characteristic that is specified by the <measure function> part in the query header. Executing a READ? query aborts any pending acquisition. The READ? query does not affect the instrument settings.

Before the READ? query, the CONFigure command must be executed, to set up the instrument for the measurement task to be performed. Executing CONFigure and READ? in order, without any command in between, is equivalent to executing the MEASure? query.

A READ? query allows the same parameter sets as the corresponding MEASure? and CONFigure instructions. Their use distinguishes from these instructions in that they only serve to specify the desired result from a READ? query. They don’t affect the instrument settings. They may also be sent for reasons of compatibility with the preceding CONFigure instruction.

The default :VOLTage node specifies that the requested characteristic relates to the voltage component of the signal. For example, the rise time or frequency of the voltage.

A READ? query can be executed only when the oscilloscope is in the digital mode (INStrument:SELect DIGital). The digital mode is selected after *RST. Executing this query when the instrument is in the analog mode generates execution error - 221,"Settings conflict; Digital mode required".